chore: Move the drift_offline_first to legacy in favor of Serverpod implementation (#32)

legacy/drift_offline_sync/build.yaml

@@ -0,0 +1,17 @@
+targets:
+  $default:
+    builders:
+      drift_dev:
+        options:
+          store_date_time_values_as_text: true
+          use_sql_column_name_as_json_key: true
+          sql:
+            dialects:
+              - sqlite
+              - postgres
+    sources:
+      include:
+        - $package$
+        - lib/**
+        - test/**
+        - benchmark/**